This goes great over a Denali or TKA 200 fleece, water - resistant and very good at wind-proofing insulating layers. Medium is just a tad too big for my 5'8" 162 lb frame but with a layer under it does the job.

When I bought this originally it was a medium, but being 5'8" and 162lbs, the small was actually better since North Face has a larger sizing than most companies. Great jacket that can be used under a shell for maximum warmth and wind protection since this jacket isn't exactly wind-resistant.

If you're looking for a bit of extra warmth under a windproof layer, this vest will do the job. Being 5'8" and 162 lbs, the medium was too wide but sizing down to a small helped it look less bulky on me.